The best sounding 5687 available. The Tung-Sol made 5687 is the ONLY way to go. We have both black plate and bronze plate. Much of our stock are 1950's with "D" getters from bulk. These tubes will come in white boxes.
These 5687 replaced Jan/Philips tubes in my SACD player. The sound retains the detail it had before but the textures are smoother and more musical. Full bass performance and nice sense of air to the sound space.